Lexus 2013 IS250, Owner'S Manual

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234
4-5. Using the driving support systems
IS250_EE(OM53B11E)

Dynamic radar cruise control can be set when

The shift lever is in D.

Range 4 or higher of D has been selected by using the paddle shift.

Vehicle speed is above approximately 50 km/h (30 mph).

Accelerating after setting the vehicle speed
The vehicle can accelerate normally. After acceleration, the set speed resumes.
However, during vehicle-to-vehicle distance control mode, the vehicle speed
may decrease below the set speed in order to maintain the distance to the vehicle
ahead.

Automatic cancelation of vehicle-to-vehicle distance control
Vehicle-to-vehicle distance control driving is automatically canceled in the fol-
lowing situations:

Actual vehicle speed falls below approximately 40 km/h (25 mph).

VSC is activated.

TRC is activated for a period of time.

When the VSC or TRC system is turned off by pressing the VSC OFF switch.

The sensor cannot operate correctly because it is covered in some way.

The windshield wipers are operating at high speed (when the wipers are in
AUTO mode or the high speed wiper operation).

When snow mode is set.

Pre-crash braking is activated.
If vehicle-to-vehicle distance control driving is automatically canceled for any
other reason, there may be a malfunction in the system. Contact any authorized
Lexus dealer or repairer, or another duly qualified and equipped professional.

Automatic cancelation of constant speed control
The cruise control will stop maintaining the vehicle speed in the following situa-
tions:

Actual vehicle speed is more than approximately 16 km/h (10 mph) below the
set vehicle speed.
At this time, the memorized set speed is not retained.

Vehicle speed falls below approximately 40 km/h (25 mph).

VSC is activated.

TRC is activated for a period of time.

When the VSC or TRC system is turned off by pressing the VSC OFF switch.

Pre-crash braking is activated.